Late...when do I take a test?! **update

Kristina
At what point do I take a test? I'm 4 days late with no period symptoms and I'm not sure when to take a test. I don't want to get excited, too much pain from the past. But I am hopeful so I'm not sure what to do...thanks in advance!
***update
I took one this morning and it was negative. I'm pretty depressed about it.